diff --git a/python/paddle/static/amp/fp16_utils.py b/python/paddle/static/amp/fp16_utils.py
index bfe0a146f233f42a6174bff052bdbaf91da3e20a..24a2a53d35a236572abb1e1bfaf2eee4dd3a5903 100644
--- a/python/paddle/static/amp/fp16_utils.py
+++ b/python/paddle/static/amp/fp16_utils.py
@@ -438,6 +438,9 @@ def cast_model_to_fp16(program, amp_lists=None, use_fp16_guard=True):
         "while",
         "while_grad",
         "cast",
+        "tensor_array_to_tensor",
+        "lod_array_length",
+        "write_to_array",
     }
     global_block = program.global_block()
     keep_fp32_ops = set()